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drother - where did you find that chart? I'd love to see one for my 5 wind 30100 lmt motor.

The bearings in my TP Power motor aren't rated for the speeds the motor can turn. I wonder if that's an issue here? WB could be right - it could also be surge beating things up.

I'll hopefully be able to do some meaningful testing with the Castle motor and the P2 unit soon - I've already spun it up on low power and it's a lot better than the TP power motor, at least with the vesc. Dunno if it'll take as much power yet though.

True. Lol about the weather - for me, it's too hot to race or go to the dyno - it was 96* F today (~36* C); there's a window here in the fall and in the spring, then winter's too cold. The nice thing about Texas (where I bought land) - it's cooler in the summer than here, and all of winter...

Someone sent me a link to a company that makes alot of these wheels... unfortunately I don't remember where it was... It is pretty amazing how cheaply they can do this stuff. I wonder what will happen if they attack Taiwan? When do you think you'll have your stuff back together?

I found this today - a guy is drilling holes in copper sheet, soldering nickel strips to the sheet, and then spot welding the nickel sheet to the cells. But your solution might be better. Check it out (scroll down a bit): https://www.electricbike.com/introduction-battery-design-2/

That looks exactly like the billet impeller I'm using (obviously mine is bigger, but the machining is almost identical) - the difference is I paid about $600 for mine. Where did you get that from?

The APD could likely be the best $$/performance ESC available. The mosfets on the APD are good for 600 amps combined and 80 volts... so their ratings are probably very conservative, esp. with heatsinks.

That looks great. What did the voltage drop down to under load? And yes, I'm thinking of ordering the APD F series myself - WAY cheaper than the other APD and should still support (barely) the P2 unit at full tilt. Plus it has conformal coating - that the more expensive one lacked...

Wow - the battery stuff looks great. I'm glad it's working out for you. I have to say, I have an original 75/300 VESC, and it's really not good. It doesn't even perform the same day to day with the same settings. I wouldn't recommend another one. I've been using in in my most recent videos...

So the solder is between the copper and the aluminum (I think that's aluminum on the cells)?

Yes, the whole 1/4 mile. I think for your application, you should see some significant performance improvement - assuming you can jet it for boost.

I agree with WB - more voltage is better (up to a point) - you get less current draw, less cable-related voltage drop, etc. I would encourage you to try to stay away from a gear box - not that it's impossible, it's just very difficult to make work at these speeds reliably. I'm discovering a...

Nice! Anything you're doing different with the impeller shaft?

WB - I think our results are a little skewed because I think we're both in the choke part of the map - I know for sure I am. It took less than 14kW to get to ~650 hp and now it's taking 33kW to get to ~722 hp - hopefully meth injection will help a bit with that. FWIW, I was trying to find a...

Thinking about this some more, I wonder if the impeller to volute contact and your current spikes are related? If you have access to a high speed camera (longshot, I know), you could try videoing the impeller - anything over 1,000 fps will likely give you useful info. There are actually a...

That's quite a mystery! Keep us informed...

Is there any play in it?

Wow. Maybe it hit some kind of resonance? Is it just relying on the motor bearings, or is there another support bearing?